Mining-machine.



L. ROBINSON.

MINING MACHINE.

APPLICATION FILED JULY 1, 1913.

Patented Jan. 12, 1915.

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L. ROBINSON. MINING MACHINE.

APPLIUATION TILED JULY '1. 1913.

Patented J an. 12, 1915.

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26 ,5 A9 28 23 6g 00 1 Rxw- I v /%/V/ fl/fl A 2 i I r"\ 2g Swumtom ,ZAyA 2054 @4022 THE NGRRIS PETERS CO-. PHoT0-L ITHO.. WASHINGTON D. c.

LIGE ROBINSON, OF EMPIRE, ALABAMA.

MINING-MACHINE.

menses.

Specification of Letters Patent.

. Patented J an. 12, 1915..

Application filed .1112 7, 1913. Serial No. 777,762.

To all whom it may concern Be it known that I, Lien ROBINSON, a citizen of the United States, residing at Empire, in the county of Walker and lotate of Alabama, have invented certain new and useful Improvements in lVlining-lvlachines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others-skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in mining machines.

One object of the invention is to provide a machine of this character having a tubular drill and improved means for revolving and feeding the same.

Another object is to provide a mining machine which will be simple, strong, durable and comparatively inexpensive in construction, efficient and reliable in operation and well adapted to the purpose for which it is designed.

lVith these and other objects in View, the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be more fully described and claimed.

In the accompanying drawings: Figure 1 is a side view of niv imp oved mining machine; Fig. 2 is a top plan View thereof; Fig. 3 is a central long tudinal section; Fig. 4 is a similar View of the drill body and the feed nut thereof. Fig. 5 is a. similar view of the tubular coupling shaft and the feed screw of the drill. Fig. 6 is a vertical cross-sectional view through the gear supporting block and the parts carried. thereby. Fig. 7 is a detail perspecti e view of the tubular drill body and the drill bit. Fig. 8 is a similar view of the core breaker em loyed in connection with the machine.

Mv improved mining machine comprises a drill having a tubular bodv 1 of any suitable length and diameter and which may be of skeleton formation or as shown in the present instance mav be in the form of a cylindrical shell. The forward end of the body 1 is interim-1y recessed and threaded as at 2 to receive the reduced eXteriorilv threaded end of the hollow or tubular drill bit 3 which is screwed into the threaded end of the body 1 and forms a flush engagement therewith. On the inner or rear end of the bodv 1 of the drill is formed an annular series of gear teeth 4 with which is engaged a drill operating mechanism hereinafter described. Arranged in the inner or rear end of the body 1 of the drill is a feed nut 5 which is preferably formed in two sections which are held in position in the body 1 by set screws 6. The bore of the nut 5 is enlarged in the rear portion thereof as at 7 and said enlarged end of the bore is thread ed interiorly to receive a tubular coupling shaft or journal 8 by means of which the drill operating mechanism is coupled to or held in operative engagement with the body of the drill as will be hereinafter more fully described. The opposite or smaller end 9 of the bore of the nut 5 is threaded to engage a combined drill supporting shaft and feed screw 10 which is inserted through the coupling shaft or journal 8 and through the outer portion of the body of the drill and has an operative engagement with the threaded bore- 9 of the nut.

Loosely arranged in the outer portion of the body 1 and having a loose sliding engagement with the shaft 10 is a drill centering and suppo ting d sk 11 which holds the outer end of the drill bodv and the bit in position and concentric to the shaft 10. The forward end of the shaft 10 is provided with a sharp po nt to engage the surface of the wall of coal or ore to be drilled, wh le the inner end of the shaft is provided with a squared head 12 wh ch is adapted to engage a socket 13 formed on a sleeve 11 which is rigidly secured to an upr ght supporting post or standard 15 wh ch is d sposed between the floor and ceiling of the drift or passage in the m ne where the coal or ore is be ng worked and which has its ends pointed to form a firm grip or engagement w th the floor or ceiling.

The drill operating mechanism comprises a gear su orting block 16 in the upper side of wh ch is a sem -c rcula bearing groove or channel 17 which is ada ted to receive and to evoluhlv support the cou- Dling shaft 8. The shaft or jou nal 8 is held in operati e pos t on in the channel 17 by a cap 18 which is hin ed at one s de to the upper side of the block and wh ch has formed in its inner s de a. long tudinal bear ng channel 19, wh ch when the cap is c osed registers with the channel 17 in the b ock and forms a bea ing passage for the shaft or ournal 8. The cap 18 is fastenedin a closed or ope ative posit on on the block 16 by a. turn button or other suitable fastening 20 arranged on the upper side of the block 16 and adapted to be engaged with a recess 21 in the adjacent side of the cap as shown. In order to hold the cap rigid when in a closed position and to enable the same to resist the pressure of the drill operating mechanism without straining the hinges or catch of the cap, I provide the latter with stop lugs 21, arranged on the lower side thereof and adapted to be engaged with the notches or recesses :22 formed in the top of the block.

In the rear ends of the block 16 and the cap 18 are formed sockets or recesses the purpose of which will be hereinafter described. On the lower side of the bottom of the block adjacent to its sic es are formed pairs of flanges 2% between which are revolubly mounted supporting rollers where by the machine may be readily moved into position for operation. Formed on or rigidly secured to the opposite sides of the block 16 substantially in line with the center of the passage through the block and cap are laterally projecting stud shafts 26 on which are revolubly mounted combined spur gears 27 and operating wheels 28, said operating wheels having crank handles 29 whereby the wheels and gears '27 are revolved on said stud shaft. The gears 27 when thus arranged are adapted to engage the teeth 4 on the rear end of the body 1 of the drill whereby the latter and the bit in the forward end thereof are revolved in the proper direction for cutting into the coal or rock being drilled.

The block 16 is coupled to drill and held in position for engaging the gears 27 with the gear teeth 4 on the bodv of the drill by a stop collar 30 which is adjustably secured to the coupling shaft or journal 8 by a set screw 31 and between which and the end of the block 15 is arranged an anti-frictional thrust bearing comprising a washer or wear plate 32 which is engaged with the rear end of the block 16 and cap 18 and is held against rotation with the coupling member 8 by studs 33 formed on the forward side of the washer and which engage the recesses 23 in the end of the block and cap as shown. In the forward side of the stop collars 30 are formed a series of recesses St in which are revolubly mounted anti-friction rollers 35, said rollers having a revoluble engagement with the outer side of the washer plate thereby preventing the frictional engagement of the stop collar 30 with the washer or end of the block 16. hen the washer plate 32 becomes worn from continuous use. the same may be readily removed and replaced by a new washer plate as will be understood. By adjustably fastening the stop collar 50 to the shaft 8 it will be seen that any wear of the gears 27 or other parts may be readily taken up and these parts at all times held in perfect working engagement.

lin order to provide a smooth surface on which the rollers 25 of the block 16 may freely travel, 1 preferably provide base plate 36 formed of metal or other suitable material and which is placed on the floor or bottom of the drift slow the machine and is held in place by suitable stakes passed through laterally projecting loops or apertured ears 53'7" on the side edges of the plate, said stakes being firmly driven into the ground or bottom of the drift. The loops or apertured ears 37 also serve as means for conveniently lifting and carrying the plate 36.

In the operation of the drill the operating wheels 28 which also serve as fly wheels and the gears 27 are revolved in the proper direction by the crank handles 29. The move- 1 ment of the gears 27 is imparted to the body and bit of tie drill in the manner described. The engagement of the threaded. bore 9 of the feed nut 5 with the supporting shaft 10 will feed the drill into the work as the drill is revolved in the manner described, thus forming a circular bore orpassage in the wall of coal or ore. The core of coal or ore which is thus formed by the drill will extend or pass into the tubular body thereof pushing the disk 11 back into the body until said disk engages the end of the feed nut 51. After a bore has thus been formed in the coal or ore the operating mechanism of the drill is reversed and the latter fed outwardly or retracted from the bore after which my improved core breaker 38 is inserted into the bore around the core of coal or ore and the latter broken off and removed with the core breaker from the bore as will be readily understood.

The core breaker comprises a tube corresponding in diameter to and somewhat greater in length than the body of the drill and on the outer end of the core breaker is formed an anvil or offset lu 29 which is adapted to be struck by a hammer or other suitable instrument after the core breaker has been inserted into the bore formed by the drill, thus breaking the core which may then be readily removed by the breaker in the manner described.

From the foregoing description taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood with out requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention as claimed.

Having thus described my invention, what I claim is 1. A mining machine of the characterdereed screw and drill scribed comprising an imperforate tubular drill having a circular bit at its outer end, a feed screw extending through the drill and having means at its forward end to engage the material being drilled, said feed screw being smaller than the inner wallof the tubular drill to allow a space to receive material bored out, a feed nut to move on said screw and connected with the tubular drill to move with the same and means for rotating the feed nut and drill.

2. A mining machine comprising a drill having a tubular body, a drill bit detachably secured in the outer end of said body, an annular series of gear teeth formed on the inner end thereof, a feed nut secured in the inner end of the body of the drill, a feed screw arranged through the body of the drill and adapted to operatively support said feed nut, a tubular coupling shaft secured at its inner end in said feed nut, a gear supporting block adapted to revolubly support said coupling shaft, a stop collar on said shaft, a thrust bearing between said collar and the adjacent end of said gear supporting block, and drill operating gears revolubly mounted on said block and engaging the gear teeth on the end of the drill.

3. A mining machine of the character described comprising a drill having a tubular body, a hollow bit detachably secured to the outer end of the body, a centering and supporting disk loosely mounted in the outer end of the tubular drill body, a combined supporting shaft and feed screw arranged through the body of the drill and through the centering disk therein and having a pointed outer end to engage the surface to be bored, a two-part feed nut secured in the drill body and having an operative engagement with said feed screw, an annular series of gear teeth formed on the inner end of the drill body, a tubular coupling shaft secured to said feed nut and projecting beyond the inner end of the body of the drill, a gear supporting block adapted to revolubly support said coupling shaft, drill operating gears revolubly mounted on said block and engaging the teeth on said drill body, fly wheels connected with said gears, crank handles arranged on said fly wheels, and means to support the inner end of said feed screw.

4. A mining machine of the character clescribed comprising a drill having a tubular body, a bit secured in the outer end thereof, a combined supporting shaft and feed screw, a feed nut secured in the body of the drill and having an operative engagement with said screw, a coupling shaft loosely mounted on said supporting shaft and feed screw, a gear supporting block having in its upper side a bearing channel, a cap hingedly at tached to said block and adapted to be fastened in operative engagement thereto, said cap having therein a bearing channel adapted to register with the channel in said block to form a bearing passage for said coupling shaft, gear teeth formed on the rear end of said tubular drill body, combined operating wheels and gears revolubly mounted on said block in position to engage said gears with the teeth on the end of the drill body, a stop collar adjustably secured to the rear end of said coupling shaft, a thrust hearing between said stop collar and the rear end of said block and cap, and a wear plate detachably secured to and held in position on the rear end of said block and cap and forming part of said thrust bearing.

5. A mininr' machine of the character described comprising a drill having a tubular body, a bit secured in the outer end of said body, a combined supporting shaft and feed screw adapted to be inserted through said tubular drill body and bit and having its forward end engaged with the material to be drilled, means to support the rear end of said shaft, a feed nut formed in sections and secured in the rear end of said tubular body, said nut having a threaded engagement with said supporting shaft and feed screw, a tubular coupling shaft having a threaded connection with said nut and a loose engagement with said supporting shaft and feed screw, a gear supporting block adapted to revolubly support said coupling shaft and the parts carried thereby, and means to operate said drill.

6. A mining machine of the character described comprising a tubular drill, a feed screw therein and having a pointed front end to engage the object to be drilled, a nut engaged with the screw and fixed to the drill, a coupling shaft connected with said nut, a gear supporting block having in its upper side a bearing channel, a cap operatively secured to said block and having therein a bearing channel adapted to register with the channel in the block to form a bearing passage for said coupling shaft, supporting rollers arranged on the bottom of said block, means to hold said coupling shaft in operative engagementwith said block, and means for rotating the nut.

7. A mining machine of the character described comprising a tubular drill having a bit at its outer end, a feed screw extending through the drill and having means at its forward end to engage the material being drilled, a feed nut to move on said screw and connected with the tubular drill to move the same, means at the rear end of the tubular drill to rotate the same and the nut and a centering member on the screw and movable longitudinally in the tubular drill.

8. A mining machine of the character described comprising a drill having a tubular body, an annular bit detachably secured in the outer end of said body, gear teeth formed on the inner end of the latter, a feed.

nut secured in the inner end of said body, said nut having formed in its inner end an enlarged socket with screw threaded concentric walls, a feed screw arranged through the body of the drill and having an operatively supporting engagement with the smaller bore of the outer end of the feed nut, means for anchoring the rear end of the feed screw, a tubular coupling shaft or journal secured partly in the screw threaded socket formed in the inner end of the feed nut, a gear supporting block adapted to support said coupling shaft or journal, and operating gears revolubly mounted on said block and engaging the teeth on said drill body, whereby the latter is revolved to operate the drill.

9. A mining machine of the character described comprising a tubular drill having a bit at its outer end, a feed screw extending through the drill and having means at its forward end to engage the material being drilled, a feed nut to move on said screw and connected with the tubular drill to move the same, a tubular journal fixed to the nut and surrounding the screw, a movable bearing on the journal, the latter having its rear ends projecting through said bearing, an adjustable stop on the projecting end of said journal and means mounted on said bearing for rotating the drill, nut and journal.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

LIGE ROBINSON. Witnesses:

W. S. PRITCHARD, W. M. SORRELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

